enh(cpp) add C++26 keywords, #embed, and compiler-builtin types

Author: Eisenwave

CHANGES.md

@@ -60,6 +60,7 @@ Core Grammars:
 - fix(yaml) - Fixed wrong escaping behavior in single quoted strings [guuido]
 - enh(nim) - Add `concept` and `defer` to list of Nim keywords [Jake Leahy]
 - fix(cpp) - Exclude keywords from highlighting as function calls [Eisenwave]
+- enh(cpp) add C++26 keywords, `#embed`, and compiler-builtin types [Eisenwave]
 
 New Grammars:
 

src/languages/cpp.js

@@ -99,7 +99,7 @@ export default function(hljs) {
     begin: /#\s*[a-z]+\b/,
     end: /$/,
     keywords: { keyword:
-        'if else elif endif define undef warning error line '
+        'if else elif embed endif define undef warning error line '
         + 'pragma _Pragma ifdef ifndef include' },
     contains: [
       {
@@ -151,6 +151,7 @@ export default function(hljs) {
     'constexpr',
     'constinit',
     'continue',
+    'contract_assert',
     'decltype',
     'default',
     'delete',
@@ -181,8 +182,10 @@ export default function(hljs) {
     'or',
     'or_eq',
     'override',
+    'pre',
     'private',
     'protected',
+    'post',
     'public',
     'reflexpr',
     'register',
@@ -212,7 +215,9 @@ export default function(hljs) {
     'volatile',
     'while',
     'xor',
-    'xor_eq'
+    'xor_eq',
+    '_Atomic',
+    '_BitInt'
   ];
 
   // https://en.cppreference.com/w/cpp/keyword

test/markup/cpp/function-declarations.expect.txt

@@ -23,3 +23,7 @@
 <span class="hljs-function"><span class="hljs-keyword">explicit</span> <span class="hljs-title">A</span><span class="hljs-params">()</span>: a(<span class="hljs-number">10</span>) {</span>}
 
 <span class="hljs-function"><span class="hljs-keyword">extern</span> <span class="hljs-type">void</span> <span class="hljs-title">f</span><span class="hljs-params">(<span class="hljs-type">int</span>)</span>, <span class="hljs-title">g</span><span class="hljs-params">(<span class="hljs-type">char</span>)</span></span>;
+
+<span class="hljs-function"><span class="hljs-type">void</span> <span class="hljs-title">throwing</span><span class="hljs-params">(<span class="hljs-type">int</span> x)</span> <span class="hljs-keyword">noexcept</span>(<span class="hljs-literal">false</span>)</span>;
+<span class="hljs-function"><span class="hljs-type">void</span> <span class="hljs-title">deleted</span><span class="hljs-params">()</span> </span>= <span class="hljs-keyword">delete</span>(<span class="hljs-string">&quot;reason&quot;</span>);
+<span class="hljs-function"><span class="hljs-type">void</span> <span class="hljs-title">contracts</span><span class="hljs-params">(<span class="hljs-type">int</span> x)</span> <span class="hljs-keyword">pre</span>(x &gt; <span class="hljs-number">10</span>) <span class="hljs-keyword">post</span>(r : r != <span class="hljs-number">0</span>)</span>;

test/markup/cpp/function-declarations.txt

@@ -23,3 +23,7 @@ void A(): a(10) {}
 explicit A(): a(10) {}
 
 extern void f(int), g(char);
+
+void throwing(int x) noexcept(false);
+void deleted() = delete("reason");
+void contracts(int x) pre(x > 10) post(r : r != 0);

test/markup/cpp/function-like-keywords.expect.txt

@@ -7,6 +7,8 @@
 
 <span class="hljs-keyword">for</span> (;;) {}
 
-<span class="hljs-function"><span class="hljs-type">void</span> <span class="hljs-title">f</span><span class="hljs-params">()</span> </span>= <span class="hljs-keyword">delete</span>(<span class="hljs-string">&quot;reason&quot;</span>);
-
 <span class="hljs-keyword">static_assert</span>(<span class="hljs-literal">true</span>);
+<span class="hljs-keyword">contract_assert</span>(<span class="hljs-literal">false</span>);
+
+<span class="hljs-keyword">_BitInt</span>(<span class="hljs-number">64</span>) x;
+<span class="hljs-keyword">_Atomic</span>(<span class="hljs-type">int</span>) y;

test/markup/cpp/function-like-keywords.txt

@@ -7,6 +7,8 @@ while (ch) {}
 
 for (;;) {}
 
-void f() = delete("reason");
-
 static_assert(true);
+contract_assert(false);
+
+_BitInt(64) x;
+_Atomic(int) y;